Occultation Data Processing System

KASI is in charge of the scientific research using KOMPSAT-5 occultation data. The scientific data of KOMPSAT-5 will be released to the public. KASI plans to release raw data and processed data. KASI is developing KROPS (KASI Radio Occultation Processing System) for processing the GPS radio occultation data and generating atmospheric profiles. Figure 9 describes the external interface of KROPS. In Fig. 9,

Fig. 9 KROPS external interfaces
Fig. 10 KROPS main window

K5 MCE is the KOMPSAT-5 Mission Control Element, which receives the occultation and POD data from the spacecraft. KASI operates also the IGS (International GNSS Service) Global Data Center (GDC). The occultation data will be archived in the KASI GDC and then released to public users.

A Linux-based PC workstation is used as a platform for KROPS. Figure 10 shows the user interface of KROPS. The algorithm implemented in KROPS has been tested by using data from CHAMP and COSMIC. In Fig. 11, preliminary results of processing CHAMP data from June 20, 2004 with KROPS are shown. The comparison data are from the PLP (Planar Langmuir Probe) of CHAMP (Lee et al. 2007).

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